Revert of [package.proto] convert deps from list to map.

unittests/test_test.py

Index: unittests/test_test.py
diff --git a/unittests/test_test.py b/unittests/test_test.py
index 321ebbed5513c22392eb7f4f287972e468e504db..5a9803225347b4af7cb5715cf6d3c748a209803f 100755
--- a/unittests/test_test.py
+++ b/unittests/test_test.py
@@ -215,9 +215,11 @@
         api_version=1,
         project_id='test_pkg',
         recipes_path='',
-        deps={
-          'recipe_engine': package_pb2.DepSpec(url='file://'+ROOT_DIR),
-        }
+        deps=[
+            package_pb2.DepSpec(
+                project_id='recipe_engine',
+                url='file://'+ROOT_DIR),
+        ],
     )
     package.ProtoFile(self._recipes_cfg).write(test_pkg)